Move c/r/extensions/* into extensions namespace

chrome/renderer/extensions/app_window_custom_bindings.h

Index: chrome/renderer/extensions/app_window_custom_bindings.h
diff --git a/chrome/renderer/extensions/app_window_custom_bindings.h b/chrome/renderer/extensions/app_window_custom_bindings.h
index 51c98e7a9f9f35e591111b66b8a2a273b45c5eee..e7dfb9102d7632c91fb552760a77bf2bd47c4cae 100644
--- a/chrome/renderer/extensions/app_window_custom_bindings.h
+++ b/chrome/renderer/extensions/app_window_custom_bindings.h
@@ -7,14 +7,13 @@
 
 #include "chrome/renderer/extensions/chrome_v8_extension.h"
 
-class ExtensionDispatcher;
-
 namespace extensions {
+class Dispatcher;
 
 // Implements custom bindings for the app.window API.
 class AppWindowCustomBindings : public ChromeV8Extension {
  public:
-  explicit AppWindowCustomBindings(ExtensionDispatcher* extension_dispatcher);
+  explicit AppWindowCustomBindings(Dispatcher* dispatcher);
 
  private:
   static v8::Handle<v8::Value> GetView(const v8::Arguments& args);